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JEE · NEET Previous Year Question

$The ratio of the radii of the nuclei_{13} Al^{27} and_{52} T e^{125} approximately$

Topic: NEET PYQ

Answer: A. Full step-by-step solution below.

A $6 : 10$
B $13 : 52$
C $40 : 177$
D $14 : 73$

Correct answer: A

Solution

(a) R \propto (A)^{1/3} from R = R_{0} A^{1/3} . R_{Al} \propto (27)^{1/3} and R_{Te} \propto (125)^{1/5} ∴ \frac{R _{Al}}{R _{Te}} = \frac{3}{5} = \frac{6}{10}

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